Extra-large trucks could soon be rolling through Wanganui, thanks to new strengthening work being carried out on the Cobham Bridge.
Work on the bridge was to begin today and finish in late October.
David McGonigal from the New Zealand Transport Agency, which looks after the country's highway network, said the bridge strengthening work was part of a national programme by NZTA to bolster economic productivity by opening up routes for high productivity motor vehicle [HPMV] trucks.
An HPMV truck is the same width and height as a conventional truck but can be longer or heavier. A permit is needed for an HMPV truck.
He said work had already begun on strengthening the Bulls Bridge. "Once both bridges are complete, Wellington to Wanganui will become a fully fledged HPMV route, which will carry significant economic benefits for the region."
Mr McGonigal said the use of HPMVs reduced the number of trips needed because they carried more freight per trip.
"The reduction in travel offers significant commercial advantages, including lower vehicle operating costs, driver hours and fuel, as well as safety benefits from the reduced crash risk that fewer truck trips provide."
Mr McGonigal said the HPMV trucks were newer, quieter and cleaner than the older, conventional trucks.
"The fuel savings mean reduced carbon emissions for each tonne of freight moved," he said.
The NZTA was working to expand HPMV routes throughout New Zealand.
Motorists should expect the Cobham Bridge to be reduced to one lane during the day, with traffic control in place.
At night both lanes will be open.